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/*
* Copyright (C) 2003-2015 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include "DecoderControl.hxx"
#include "DecoderError.hxx"
#include "MusicPipe.hxx"
#include "DetachedSong.hxx"
#include <assert.h>
DecoderControl::DecoderControl(Mutex &_mutex, Cond &_client_cond)
:mutex(_mutex), client_cond(_client_cond),
state(DecoderState::STOP),
command(DecoderCommand::NONE),
client_is_waiting(false),
song(nullptr),
replay_gain_db(0), replay_gain_prev_db(0) {}
DecoderControl::~DecoderControl()
{
ClearError();
delete song;
}
void
DecoderControl::WaitForDecoder()
{
assert(!client_is_waiting);
client_is_waiting = true;
client_cond.wait(mutex);
assert(client_is_waiting);
client_is_waiting = false;
}
bool
DecoderControl::IsCurrentSong(const DetachedSong &_song) const
{
switch (state) {
case DecoderState::STOP:
case DecoderState::ERROR:
return false;
case DecoderState::START:
case DecoderState::DECODE:
return song->IsSame(_song);
}
assert(false);
gcc_unreachable();
}
void
DecoderControl::Start(DetachedSong *_song,
SongTime _start_time, SongTime _end_time,
MusicBuffer &_buffer, MusicPipe &_pipe)
{
assert(_song != nullptr);
assert(_pipe.IsEmpty());
delete song;
song = _song;
start_time = _start_time;
end_time = _end_time;
buffer = &_buffer;
pipe = &_pipe;
LockSynchronousCommand(DecoderCommand::START);
}
void
DecoderControl::Stop()
{
Lock();
if (command != DecoderCommand::NONE)
/* Attempt to cancel the current command. If it's too
late and the decoder thread is already executing
the old command, we'll call STOP again in this
function (see below). */
SynchronousCommandLocked(DecoderCommand::STOP);
if (state != DecoderState::STOP && state != DecoderState::ERROR)
SynchronousCommandLocked(DecoderCommand::STOP);
Unlock();
}
bool
DecoderControl::Seek(SongTime t, Error &error_r)
{
assert(state != DecoderState::START);
assert(state != DecoderState::ERROR);
switch (state) {
case DecoderState::START:
case DecoderState::ERROR:
gcc_unreachable();
case DecoderState::STOP:
/* TODO: if this happens, the caller should be given a
chance to restart the decoder */
error_r.Set(decoder_domain, "Decoder is dead");
return false;
case DecoderState::DECODE:
break;
}
if (!seekable) {
error_r.Set(decoder_domain, "Not seekable");
return false;
}
seek_time = t;
seek_error = false;
LockSynchronousCommand(DecoderCommand::SEEK);
if (seek_error) {
error_r.Set(decoder_domain, "Decoder failed to seek");
return false;
}
return true;
}
void
DecoderControl::Quit()
{
assert(thread.IsDefined());
quit = true;
LockAsynchronousCommand(DecoderCommand::STOP);
thread.Join();
}
void
DecoderControl::CycleMixRamp()
{
previous_mix_ramp = std::move(mix_ramp);
mix_ramp.Clear();
}
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